One of the preventable causes of tinnitus is excessive noise exposure. In some instances of noise exposure, tinnitus can be noticed even before hearing loss develops, so it should be considered a warning sign and an indication of the need for hearing protection in noisy environments. Medications can also damage inner ear hair cells and cause tinnitus.
Derivative Liability Law and Legal Definition. Derivative liability refers to being held accountable for the acts of another, based upon assistance provided to that person. Anyone who intentionally participates in a crime as an aider, abettor, or co-conspirator may be held responsible for it. Derivative instruments.
Full Definition of DERIVATIVE. 1. : a word formed by derivation. 2. : something derived. 3. : the limit of the ratio of the change in a function to the corresponding change in its independent variable as the latter change approaches zero.4. a contract or security that derives its value from that of an underlying asset (as another security) or from the value of a rate (as of interest or currency exchange) or index of asset value (as a stock index). See derivative defined for English-language learners. See derivative defined for kids.